I wrote an article on this some time ago.  It predates the public 
Internet, so there's no article link to provide.  Yes, BNF figured into 
this prominently, but so many people don't seem to think in those terms 
any more.


  Write your own command.com

  * *Author:*
  *
    George Toft
    <https://dl.acm.org/profile/81100207235>

Authors Info & Claims 
<https://dl.acm.org/doi/10.5555/172026.172037#pill-authors__contentcon>
Windows/DOS Developer's Journal 
<https://dl.acm.org/toc/wind/1992/3/12>Volume 3 
<https://dl.acm.org/toc/wind/1992/3/12>Issue 12 
<https://dl.acm.org/toc/wind/1992/3/12>Dec. 1992 pp 52–58

Regards,

George Toft

On 11/12/2023 11:56 PM, Steve Litt via PLUG-discuss wrote:
> Hi all,
>
> The GoLUG mailing list is currently featuring a discussion of parsing,
> compiler building, interpreter building, etc, with explorations into
> Backus-Naur form, flex, bison, and a Python approach. Our next meeting
> will be about these topics.
>
> The GoLUG mailing list is available at
> http://golug.org/mailman/listinfo/golug_golug.org
>
> Thanks,
>
> SteveT
>
> Steve Litt
>
> Autumn 2023 featured book: Rapid Learning for the 21st Century
> http://www.troubleshooters.com/rl21
> ---------------------------------------------------
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